Merge pull request #1090 from raulMrello/thread_signal_clr

Updated Thread.cpp|.h to support signal clear

Author: 0xc0170

libraries/rtos/rtos/Thread.cpp

@@ -62,6 +62,10 @@ int32_t Thread::signal_set(int32_t signals) {
     return osSignalSet(_tid, signals);
 }
 
+int32_t Thread::signal_clr(int32_t signals) {
+    return osSignalClear(_tid, signals);
+}
+
 Thread::State Thread::get_state() {
 #ifndef __MBED_CMSIS_RTOS_CA9
     return ((State)_thread_def.tcb.state);

libraries/rtos/rtos/Thread.h

@@ -64,6 +64,12 @@ class Thread {
     */
     int32_t signal_set(int32_t signals);
 
+    /** Clears the specified Signal Flags of an active thread.
+      @param   signals  specifies the signal flags of the thread that should be cleared.
+      @return  resultant signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+    */
+    int32_t signal_clr(int32_t signals);
+
     /** State of the Thread */
     enum State {
         Inactive,           /**< Not created or terminated */